Steps to reproduce (confirmed on a demo sandbox in 3.5 Moodle version):

• Upload this multi sco SCORM 1.2 to a course : https://drive.google.com/file/d/18B2d5S32loQZ2OPOXW6aqtAV96QwS-K5/view?usp=sharing]
• Click on the first entry link (called Accueil) in the left drawer : view the first SCO in the package
• Click on the next button in the bottom of the main screen : the next slide (Objectifs) is displayed
• Click on the next button in the bottom of the main screen : the next slide (Introduction) is displayed
• Result : the next button in the bottom of the main screen is disabled
• Click on the second directory link (called L'origine et les types de thé) in the left drawer : nothing happens
• Click on the third directory link (called La Chine, berceau du thé) in the left drawer : nothing happens
• Click on the first entry link (called un arbuste nommé camelia sinensis) in the left drawer (inside the third directory link, called La Chine, berceau du thé) : view the second SCO in the package
• Click on the next button in the bottom of the main screen : nothing happens
• Result : the next button (in the bottom of the main screen) does not work properly
• Solution : click twice on the entry in the left drawer in order for the next button (in the bottom of the main screen) to work.